The Herold Strop Paste Duo includes a Red and a Black Strop Paste to be used with strops and bench hones after honing or just periodic touch-up. Red paste has medium grinding effect for pre-sharpening. And Black paste has low grinding effect for fine-sharpening and polishing. Solid blocks of pastes come wrapped in foil. Do not mix pastes.
Ingredients include Chromium and Aluminum Oxide powders.